import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'


Vue.use(VueRouter)

const routes = [{
        path: '/',
        redirect: '/login'
    },
    {
        path: '/login',
        component: Login

    },
    {
        path: '/home',
        component: Home

    }
];

const router = new VueRouter({
    mode: 'history',
    routes
});

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to 将要访问的路径
    // from 当前导航正要离开的路由
    // next 是一个函数,表示放行
    // next() 放行  next('./login) 强制跳转
    if (to.path === '/login') return next();
    // 获取token
    const tokenStr = window.sessionStorage.getItem('token');
    if (!tokenStr) return next('/login');
    next();
});

export default router